(verify_accepts_iff_decompress, button-enforced)
Port of the dalek decompress chain to the risc0 fork (v4 gen):
- source patch 8b69091: decompress step_2 negate-then-conditional-assign
(the documented sqrt_ratio_i rewrite; sqrt_ratio_i itself was already
in the compatible shape); extract.sh: decompress un-opaqued,
re-extracted - the step_1/step_2 external axioms vanish from the
template, decompress is transparent.
- Proofs/DecompressSpec.lean: dalek port, instance rename
Shared0FieldElement51 -> SharedAFieldElement51.
- Proofs/FromBytesSpec.lean: PORT DELTA - this gen's from_bytes takes
RangeFrom subslices (bytes[k..]) into a local load8 CLOSURE with
literal indices instead of dalek's named load8_at: new
range_from_index_spec (over the step_simps-reduced slice index) +
closure_call_spec (same disjoint-OR loader math); window/telescope
arithmetic identical.
- Proofs/DecompressMain.lean: decompress_of_canonical (standard three)
+ verify_accepts_iff_decompress (corollary verbatim - this fork's
point-equation signature is byte-identical to dalek's):
accept <=> decompress(R) = [k]*(-A) + [s]*B (as points).
check.sh: 4-tier Phase 3b; full-lift cone exactly [3 standard +
Signature + sha512_hash3 + to_bytes + Error + Error.new]. Full button
green fresh.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
